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Old 02-08-2014, 07:35 AM   #1
devildogg OP
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Joined: Jun 2006
Location: MC nirvana Kootenay's BC
Oddometer: 598
Let me introduce myself

[ea[.jpgand my new motorcycle,never thought I would be posting way down here almost in the basement, but when I found this, and having a compulsive motorcycle disorder I had to have it , asked the SO what she thought, "will it keep you in the basement and out of my hair? then buy it"
So here I am, I am new to the Germans, spent most of my time with Italians Austrians and brits. I will definitely be a pain in the ass for a while and hopefully contribute something in the future, so here is the story
Not much history on the bike
The 70 year old guy that owns it says it runs smooth as butter
Alternator light stays on
One pushrod seal leaking
17,000km showing on the clock but no way of verifying that

So what are my priorities ? Wont pick it up for another two weeks
David
Having picture posting issues its a 1977 R100S
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Old 02-08-2014, 07:46 AM   #2
warkshop
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Location: Marietta, Ohio, USA
Oddometer: 586
Clutch splines lubed last when as this is an important service and a pain in the ass to do yourself,,,,,and a detailed maintenance history if at all possible,,,,and all the typical things when buying any see bike
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Old 02-08-2014, 07:47 AM   #3
warkshop
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You might note your links don't work,,,for me anyway
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Old 02-08-2014, 07:53 AM   #4
00_Green
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Location: Atlanta & Omaha
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http://s26.photobucket.com/user/devi...tml?sort=3&o=1

Welcome to the forum, GREAT looking ride!!

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Old 02-08-2014, 08:06 AM   #5
devildogg OP
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Location: MC nirvana Kootenay's BC
Oddometer: 598
Thanks for the picture post, using my wifes tablet its a pain in the fat fingers
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Old 02-08-2014, 08:12 AM   #6
disston
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Joined: Mar 2011
Location: Silver Spring, Md
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A leaky push rod seal you can ignore for awhile. An Alt or Gen light has to be fixed before you can go very far. No or little maintenance records means you start with changing ALL the fluids.

A lot of debate on oils of course. Do use 20w-50 in the engine. Find more info here and on the Web about the debate. If you want my opinion tuff.

Gear oil is 80w-90 GL-5. Dinosaur type works fine. The cheap one is good enough for most.

Change the brake fluid in the under the tank Master Cylinder. DOT4. You can use DOT3 if you can't find DOT4 but DO NOT USE DOT5.

Fork fluid sometimes gets more involved. Put it off till you have more time but you do want to get to this sooner than later.

Learn to do a tune up.

1...Set the valves and re-torque the heads.
2...Install new ignition points. Set Dwell or point gap and do static timing then do full advance timing with timing light.
3...Adjust carburetors as needed. Rebuild carbs if needed.

And if you have solved the charging problem by now you are allowed to go for a ride.

Welcome to the Asylum. We are the inmates and now you are one too. Plenty of other Assholes here already.
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Old 02-08-2014, 08:21 AM   #7
bpeckm
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Sweet, wow!

Alternator light stays on: that is your first priority (assuming it starts, runs, has oil pressure and all that stuff!).

The charging circuitry on these bikes is different than any of the other bikes you have mentioned. There is tons posted on this site, though nothing that will tell you, in one spot, how to troubleshoot.

Basically, the light is part of the circuit that excites the alternator. It MUST light when the ignition is switched ON, then goes out when the charging voltage exceeds the battery voltage.

The fact that it does not go out could be any of several factors. If you are conversant with electrical (?) you should check for continuity through the brushes, you should check resistance of the windings. Easy fixes would be the need for new brushes, or brushes simply not touching the sliprings.

But FIRST thing that you MUST DO, EVERY TIME you open the front cover, is disconnect the battery! If you short anything, you will blow the diodes on the board.

There is an excellent little book that is worth having, available from Motorrad Elektrik.


Otherwise, the Haynes is a good shop book. And this place has people who can answer just about anything!!

Good luck, congrats on the gorgeous bike. That is a SWEET combination of power, looks, brakes and classic old school.
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Old 02-08-2014, 08:54 AM   #8
ccmickelson
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Purty.
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Old 02-08-2014, 09:09 AM   #9
SculptD
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Location: SF, CA
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Oh, that's nice to see. Jealous. That's exactly the same as mine (in model, year, and color). Just take yours and leave it outside for a whole bunch of years, then they will be the same all way round!
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Old 02-08-2014, 11:52 AM   #10
bmwhacker
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Quote:
Originally Posted by disston View Post
Do use 20w-50 in the engine.
Darn....been using it for 30+ years....never got the memo....
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Old 02-08-2014, 11:59 AM   #11
JimGregory
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Location: Milford, CT
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That bike is real pretty!
Is that an SR500 next to it? I'd love to have that bike again.
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Old 02-08-2014, 04:04 PM   #12
Thorazine
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Joined: Sep 2013
Location: Smoggy Valley, east of Smog City, Southern Calif.
Oddometer: 701
Hoo wee. That's a purty bike. Let us know when you pick it up. Welcome to the Airhead asylum--good riding!
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Old 02-08-2014, 04:07 PM   #13
disston
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Originally Posted by bmwhacker View Post
Darn....been using it for 30+ years....never got the memo....
I think it's mentioned in the owner's or rider's manual. If it's not in yours then send the book to me and I will add it and send book back to you. No charge.
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Old 02-08-2014, 05:27 PM   #14
Bill Harris
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Location: backwoods Alabama
Oddometer: 7,288
Quote:
Do use 20w-50 in the engine.
Quote:
Originally Posted by disston View Post
I think it's mentioned in the owner's or rider's manual. If it's not in yours then send the book to me and I will add it and send book back to you. No charge.
Piffle. My /5 manual says 20W50 (pg 63 and "At a Glance"). Trying to start an Oil Thread?

And adjust the valves AFTER the head is torqued. Not before.

Nice bike, D'Dog.

--Bill
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Old 02-08-2014, 07:40 PM   #15
devildogg OP
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Location: MC nirvana Kootenay's BC
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Originally Posted by JimGregory View Post
That bike is real pretty!
Is that an SR500 next to it? I'd love to have that bike again.
I think so and he wants to sell that also i will check it out for you
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